Sometimes, "Baltic Sun" might be a mistranslation from Russian or a fan-made title. If you cannot find the exact film, search for these similar documentaries from the same era (2002-2005):

There are multiple films about St. Petersburg (especially the 300th anniversary celebrations in 2003).

To understand the value of this documentary, you must understand St. Petersburg in 2003. This was a landmark year: the city’s 300th anniversary.

After the fall of the Soviet Union in 1991, Russia spent the 1990s in economic turmoil. By 2003, under Vladimir Putin (a native of St. Petersburg), the city was experiencing a renaissance. The anniversary was a massive celebration attended by world leaders. Documentaries filmed that year captured a city at a crossroads—honoring its Tsarist past, its Soviet scars, and its optimistic future.

The "Baltic Sun" thus serves as a metaphor: after a long political winter, the sun was rising again on this historic port city.